"Endless" (Japanese: エンドレス Hepburn: Endoresu) (Japanese pronunciation: [endoɺesɯ]) is a song by Japanese band Sakanaction. It was the leading promotional track from the band's fifth studio album Documentaly, released on September 28, 2011. Created primarily by the band's vocalist Ichiro Yamaguchi over a period of eight months, the song was written as a record of what it was like to live in 2011. The song was the central composition of Documentaly, affecting the album's track order and composition.